The Spaniard - who scored 15 goals in 48 appearances in all competitions last season - has been heavily linked with a move away from the Blues this summer, with former club Juventus and AC Milan both believed to hold an interest.

But his switch of number suggests that his mind is still on the London club.

Morata's partner Alice Campello gave birth to twins last weekend

The forward shows off his new shirt (Image: Chelseafc.com)

"It is a day I will never forget, to welcome my twin sons into the world," Morata told chelseafc.com .

"My family is so important to me and I want to honour them and my wife, Alice, when I am on the pitch which is why I have decided to take a different number for the new season and remember this special day by adding the number 2 to my shirt.

"I am sorry to the fans who may have bought a number 9 with my name already, but I hope you understand my tribute and that it will not be a problem and we can make you a new one with the 29.

Morata will no longer be seen in the No.9 (Image: REUTERS)

"Thank you for your support and I hope this year there will be lots more to celebrate."

Chelsea have offered supporters who purchases a 'Morata 9' shirt from an official club store the chance to replace with a 'Morata 29' one, with all returned shirts going to the Chelsea Foundation.